Hoover Dam Tour With Lake Mead Cruise. Take a tour of the mighty Hoover Dam, where you'll explore the inside of the dam, walk through a 250-foot-long tunnel and view the 650-foot-long Nevada wing of the power plant. You’ll also enjoy a 90-minute cruise, including lunch, aboard a paddle wheeler on Lake Mead and a stop at the Ethel M Chocolate Factory. Book and Save 24% Off Hoover Dam Tour With Lake Mead Cruise.